Monday, May 22, 2023
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Tuesday, September 13, 2022
两组分物系的相对挥发度越小,则表示分离该物系()A、容易B、困难C、完全D、不完全...
Saturday, December 31, 2022
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升高精馏塔的操作压力,可以()A、降低操作温度,改善传热效果B、降低操作温度,改善分离效果C、提高生产能力,降低分离效果D、降低生产能力,降低传热效果...
Saturday, July 22, 2023
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二氧五环反应中,当反应温度升至()时即表示需再添加硫酸催化剂。A、100℃B、110℃C、145℃D、120℃...
Saturday, February 10, 2024
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化工生产中,精馏塔的最适宜回流比是最小回流比的()倍。A、1.5~2.5B、1.1~2C、2~2.5...
Thursday, May 9, 2024
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Saturday, February 10, 2024
Saturday, February 10, 2024
Tuesday, September 13, 2022
Monday, May 15, 2023